Hi kayls,
Subject to first confirming that any retailer or manufacturer on the list that you wish to visit is completely transparent ( see this article) and to making sure that any mattress you are considering meets the quality/value guidelines here … some options or possibilities I’m aware of in and around Toronto are listed here.
If you do decide to venture online, I would consider using the expertise of the members listed in post #21 here who are all very experienced and knowledgeable and specialize in providing the type of help and guidance on the phone that can help you make good choices. There is also a list of online mattress sources for Canadians in post #21 here.
Phoenix